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Old 7th April 2013
  #38
Lives for gear
 
Ike Zimbel's Avatar
 

That's the "self-resettable" fuses doing their job. I just took a look at the schematic. You really want to make sure that the -6v and -24v supplies are getting to the module. They are responsible for turning on all of the FET switches in the signal path (the J-112 transistors). If those aren't functioning, there's no way any signal will come out.
Best,
Ike